S
M
T
W
T
F
S
28
71°
50°
29
72°
49°
30
78°
57°
1
65°
47°
2
64°
49°
3
65°
44°
4
66°
50°
5
65°
47°
6
66°
49°
7
66°
49°
8
69°
52°
9
70°
53°
10
71°
53°
11
68°
51°
12
71°
54°
13
75°
55°
14
76°
54°
15
74°
55°
16
72°
55°
17
73°
54°
18
76°
55°
19
76°
56°
20
77°
57°
21
77°
56°
22
75°
56°
23
76°
54°
24
67°
48°
25
68°
51°
26
74°
55°
27
76°
54°
28
77°
48°
29
75°
51°
30
74°
52°
31
73°
51°
1
71°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Devon
Devon's July 2026 forecast shows daily high temperatures ranging from 64° to 78°, with overnight lows between 44° and 57°. The average high for July is 72° with an average low of 52°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Devon. See also: August | September | October.